goog.require('ol.Map');
goog.require('ol.View');
goog.require('ol.format.TopoJSON');
goog.require('ol.layer.Vector');
goog.require('ol.proj');
goog.require('ol.source.TileVector');
goog.require('ol.style.Fill');
goog.require('ol.style.Stroke');
goog.require('ol.style.Style');
goog.require('ol.tilegrid.XYZ');
